Accurately control length of time
Manual input time and via progress bar for accurately control to per frame.

Video to GIF Resize
you can select any size for your need. And support three interpolation option:
Sawtooth - strong contrast, distinct picture, but you may lose some details;
Sharpen - Its effect is very good, between smooth and sawtooth, picture is distinct. This is a popular way;

Smooth - Smooth edge without sawtooth, make picture looks vaguer.

Frame Rate
Display total frames in output, you can select X pictures per second for control speed in GIF animation.